Accents

If you are searching in a language with accents in most cases Google is quite capable of guessing the intention of your search.

For example if you are doing most searches in French and search ‘operation’ rather than ‘opération’ you will get French language results. However, if you also use the web in English the results could include ones in English and if you use the web mainly in English you are likely to get mainly English language results. Google bases decisions in large part on your previous behaviour.

This example is a bit extreme as one doesn’t often do a one word query, normally you will use more words which will allow Google to interpret your intent correctly.

Tip: feel free to search without accents if you can type faster without them as in most cases it doesn’t make a difference.